libs/ardouralsautil/devicelist.cc

   1 /*
   2  * Copyright (C) 2014 Robin Gareus <robin@gareus.org>
   3  * Copyright (C) 2013 Paul Davis
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <alsa/asoundlib.h>
  21 #include "pbd/convert.h"
  22 #include "ardouralsautil/devicelist.h"
  23
  24 using namespace std;
  25
  26 void
  27 ARDOUR::get_alsa_audio_device_names (std::map<std::string, std::string>& devices, AlsaDuplex duplex)
  28 {
  29         snd_ctl_t *handle;
  30         snd_ctl_card_info_t *info;
  31         snd_pcm_info_t *pcminfo;
  32         snd_ctl_card_info_alloca(&info);
  33         snd_pcm_info_alloca(&pcminfo);
  34         string devname;
  35         int cardnum = -1;
  36         int device = -1;
  37
  38         assert (duplex > 0);
  39
  40         while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) {
  41
  42                 devname = "hw:";
  43                 devname += PBD::to_string (cardnum, std::dec);
  44
  45                 if (snd_ctl_open (&handle, devname.c_str(), 0) >= 0 && snd_ctl_card_info (handle, info) >= 0) {
  46
  47                         if (snd_ctl_card_info (handle, info) < 0) {
  48                                 continue;
  49                         }
  50
  51                         string card_name = snd_ctl_card_info_get_name (info);
  52
  53                         /* change devname to use ID, not number */
  54
  55                         devname = "hw:";
  56                         devname += snd_ctl_card_info_get_id (info);
  57
  58                         while (snd_ctl_pcm_next_device (handle, &device) >= 0 && device >= 0) {
  59
  60                                 /* only detect duplex devices here. more
  61                                  * complex arrangements are beyond our scope
  62                                  */
  63
  64                                 snd_pcm_info_set_device (pcminfo, device);
  65                                 snd_pcm_info_set_subdevice (pcminfo, 0);
  66                                 snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_CAPTURE);
  67
  68                                 if (snd_ctl_pcm_info (handle, pcminfo) < 0 && (duplex & HalfDuplexIn)) {
  69                                         continue;
  70                                 }
  71
  72                                 snd_pcm_info_set_device (pcminfo, device);
  73                                 snd_pcm_info_set_subdevice (pcminfo, 0);
  74                                 snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_PLAYBACK);
  75
  76                                 if (snd_ctl_pcm_info (handle, pcminfo) < 0 && (duplex & HalfDuplexOut)) {
  77                                         continue;
  78                                 }
  79                                 devname += ',';
  80                                 devname += PBD::to_string (device, std::dec);
  81                                 devices.insert (std::make_pair (card_name, devname));
  82                         }
  83
  84                         snd_ctl_close(handle);
  85                 }
  86         }
  87 }
  88
  89 void
  90 ARDOUR::get_alsa_rawmidi_device_names (std::map<std::string, std::string>& devices)
  91 {
  92         int cardnum = -1;
  93         snd_ctl_card_info_t *cinfo;
  94         snd_ctl_card_info_alloca (&cinfo);
  95         while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) {
  96                 snd_ctl_t *handle;
  97                 std::string devname = "hw:";
  98                 devname += PBD::to_string (cardnum, std::dec);
  99                 if (snd_ctl_open (&handle, devname.c_str (), 0) >= 0 && snd_ctl_card_info (handle, cinfo) >= 0) {
 100                         int device = -1;
 101                         while (snd_ctl_rawmidi_next_device (handle, &device) >= 0 && device >= 0) {
 102                                 snd_rawmidi_info_t *info;
 103                                 snd_rawmidi_info_alloca (&info);
 104                                 snd_rawmidi_info_set_device (info, device);
 105
 106                                 int subs_in, subs_out;
 107
 108                                 snd_rawmidi_info_set_stream (info, SND_RAWMIDI_STREAM_INPUT);
 109                                 if (snd_ctl_rawmidi_info (handle, info) >= 0) {
 110                                         subs_in = snd_rawmidi_info_get_subdevices_count (info);
 111                                 } else {
 112                                         subs_in = 0;
 113                                 }
 114
 115                                 snd_rawmidi_info_set_stream (info, SND_RAWMIDI_STREAM_OUTPUT);
 116                                 if (snd_ctl_rawmidi_info (handle, info) >= 0) {
 117                                         subs_out = snd_rawmidi_info_get_subdevices_count (info);
 118                                 } else {
 119                                         subs_out = 0;
 120                                 }
 121
 122                                 const int subs = subs_in > subs_out ? subs_in : subs_out;
 123                                 if (!subs) {
 124                                         continue;
 125                                 }
 126
 127                                 for (int sub = 0; sub < subs; ++sub) {
 128                                         snd_rawmidi_info_set_stream (info, sub < subs_in ?
 129                                                         SND_RAWMIDI_STREAM_INPUT :
 130                                                         SND_RAWMIDI_STREAM_OUTPUT);
 131
 132                                         snd_rawmidi_info_set_subdevice (info, sub);
 133                                         if (snd_ctl_rawmidi_info (handle, info) < 0) {
 134                                                 continue;
 135                                         }
 136
 137                                         const char *sub_name = snd_rawmidi_info_get_subdevice_name (info);
 138                                         if (sub == 0 && sub_name[0] == '\0') {
 139                                                 devname = "hw:";
 140                                                 devname += snd_ctl_card_info_get_id (cinfo);
 141                                                 devname += ",";
 142                                                 devname += PBD::to_string (device, std::dec);
 143
 144                                                 std::string card_name;
 145                                                 card_name = snd_rawmidi_info_get_name (info);
 146                                                 card_name += " (";
 147                                                 if (sub < subs_in) card_name += "I";
 148                                                 if (sub < subs_out) card_name += "O";
 149                                                 card_name += ")";
 150
 151                                                 devices.insert (std::make_pair (card_name, devname));
 152                                                 break;
 153                                         } else {
 154                                                 devname = "hw:";
 155                                                 devname += snd_ctl_card_info_get_id (cinfo);
 156                                                 devname += ",";
 157                                                 devname += PBD::to_string (device, std::dec);
 158                                                 devname += ",";
 159                                                 devname += PBD::to_string (sub, std::dec);
 160
 161                                                 std::string card_name = sub_name;
 162                                                 card_name += " (";
 163                                                 if (sub < subs_in) card_name += "I";
 164                                                 if (sub < subs_out) card_name += "O";
 165                                                 card_name += ")";
 166                                                 devices.insert (std::make_pair (card_name, devname));
 167                                         }
 168                                 }
 169                         }
 170                         snd_ctl_close (handle);
 171                 }
 172         }
 173 }
 174
 175 void
 176 ARDOUR::get_alsa_sequencer_names (std::map<std::string, std::string>& devices)
 177 {
 178         snd_seq_t *seq= NULL;
 179         snd_seq_client_info_t *cinfo;
 180         snd_seq_port_info_t *pinfo;
 181
 182         snd_seq_client_info_alloca (&cinfo);
 183         snd_seq_port_info_alloca (&pinfo);
 184
 185         if (snd_seq_open (&seq, "hw", SND_SEQ_OPEN_DUPLEX, 0) < 0) {
 186                 return;
 187         }
 188
 189         snd_seq_client_info_set_client(cinfo, -1);
 190         while (snd_seq_query_next_client (seq, cinfo) >= 0) {
 191                 int client = snd_seq_client_info_get_client (cinfo);
 192                 if (client == SND_SEQ_CLIENT_SYSTEM) {
 193                         continue;
 194                 }
 195                 if (!strcmp (snd_seq_client_info_get_name(cinfo), "Midi Through")) {
 196                         continue;
 197                 }
 198                 snd_seq_port_info_set_client (pinfo, client);
 199                 snd_seq_port_info_set_port (pinfo, -1);
 200
 201                 while (snd_seq_query_next_port (seq, pinfo) >= 0) {
 202                         int caps = snd_seq_port_info_get_capability(pinfo);
 203                         if (0 == (caps & (SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_WRITE))) {
 204                                 continue;
 205                         }
 206                         if (caps & SND_SEQ_PORT_CAP_NO_EXPORT) {
 207                                 continue;
 208                         }
 209                         std::string card_name;
 210                         card_name = snd_seq_port_info_get_name (pinfo);
 211
 212                         card_name += " (";
 213                         if (caps & SND_SEQ_PORT_CAP_READ) card_name += "I";
 214                         if (caps & SND_SEQ_PORT_CAP_WRITE) card_name += "O";
 215                         card_name += ")";
 216
 217                         std::string devname;
 218                         devname = PBD::to_string(snd_seq_port_info_get_client (pinfo), std::dec);
 219                         devname += ":";
 220                         devname += PBD::to_string(snd_seq_port_info_get_port (pinfo), std::dec);
 221                         devices.insert (std::make_pair (card_name, devname));
 222                 }
 223         }
 224         snd_seq_close (seq);
 225 }
 226
 227 int
 228 ARDOUR::card_to_num(const char* device_name)
 229 {
 230         char* ctl_name;
 231         const char * comma;
 232         snd_ctl_t* ctl_handle;
 233         int i = -1;
 234
 235         if (strncasecmp(device_name, "plughw:", 7) == 0) {
 236                 device_name += 4;
 237         }
 238         if (!(comma = strchr(device_name, ','))) {
 239                 ctl_name = strdup(device_name);
 240         } else {
 241                 ctl_name = strndup(device_name, comma - device_name);
 242         }
 243
 244         if (snd_ctl_open (&ctl_handle, ctl_name, 0) >= 0) {
 245                 snd_ctl_card_info_t *card_info;
 246                 snd_ctl_card_info_alloca (&card_info);
 247                 if (snd_ctl_card_info(ctl_handle, card_info) >= 0) {
 248                         i = snd_ctl_card_info_get_card(card_info);
 249                 }
 250                 snd_ctl_close(ctl_handle);
 251         }
 252         free(ctl_name);
 253         return i;
 254 }